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Just received my version 2.02a 20 minutes before heading off to work. Can confirm the unit fired up first time with gps working and calibrating the output. No fuss and no hassle. My gps is the UP501 unit.

Well done Hans, you are onto a winner here.

I will fire up most probably on 20m wspr tonight when I get back home and monitor the frequency accuracy on my grabber at



73's
de andy

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From: "andyfoad@..." <andyfoad@...>.
To: QRPLabs@...
Sent: Saturday, June 22, 2013 6:57 PM
Subject: [QRPLabs] Re: U2 and GPS report (good)

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Hi David,

It's nothing special at all - honest.

It's a pure 8ft square loop which is fed at the bottom centre via
a suitable matching unit in order to transfer as much power into it
as possible ;-)

Experience with this stealth antenna for about the last 10 years
has shown that just plonking a CLC type T match is the best way
to feed it.

Capacitor (series), Inductance to deck, the another Capacitor(series).

I think the first time I made a QSO on it was on 17m SSB to 3B4CF
with just 15 watts. It was nothing more than a wire loop drawing
pinned to the bedroom wall :-)

I wrote a brief article about it here:



Really, it's just a piece of wire...

Hope that helps.

73 de Andy

--- In QRPLabs@..., "David Atkins" wrote:
>
> Hi Andy,
>
> Can you share a bit more info about your loop and its tuning? Especially for
> the lower bands.
>
> Best Wishes
> David G8XBZ